Home / 19,820.30-29,730.75-5,780.36

Finding the Fourth Proportional to 19,820.30, 29,730.75 and 5,780.36

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Solution

The fourth proportional to 19,820.30, 29,730.75 and 5,780.36 is: 8,670.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,820.30 : 29,730.75 = 5,780.36 : x
  2. Step 2: Convert to fraction form
    19,820.30/29,730.75 = 5,780.36/x
  3. Step 3: Cross multiply
    19,820.30x = 29,730.75 × 5,780.36
  4. Step 4: Simplify right side
    19,820.30x = 171,854,490.72
  5. Step 5: Solve for x
    x = 171,854,490.72/19,820.30
  6. Step 6: Final answer
    x = 8,670.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.